A wireless communication device includes a memory and a wireless interface and processing circuitry. The memory configured to store data to be transmitted and received. The wireless interface configured to transmit and receive a wireless signal. The processing circuitry coupled to the memory and configured to receive a message from another wireless device, including destination information and acknowledgement information, via the wireless interface, set, in a first period being a period in which the message from a child node which transmits the message upward while setting the child node itself as a destination is received, the acknowledgement information with respect to data received from the child node, process the message including the destination information and the acknowledgement information, and transmit a message including the set acknowledgement information via the wireless interface to another wireless device.